Build: Install most headers to Root (and libcore.a/libgui.a)

This makes out-of-tree linking possible. And at the same time, add a
CMakeToolchain.txt file that can be used to build arbitrary cmake-using
applications on Serenity by pointing to the CMAKE_TOOLCHAIN_FILE when
running cmake:

    -DCMAKE_TOOLCHAIN_FILE=~/code/serenity/Toolchain/CMakeToolchain.txt

AK/install.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+mkdir -p ../Root/usr/include/AK/
+cp ../AK/*.h ../Root/usr/include/AK/

Kernel/install.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+mkdir -p ../Root/usr/include/Kernel/
+cp *.h ../Root/usr/include/Kernel/

Kernel/makeall.sh

@@ -33,6 +33,7 @@ build_targets="$build_targets ../Games/Snake"
 build_targets="$build_targets ../Shell"
 build_targets="$build_targets ../Demos/HelloWorld"
 build_targets="$build_targets ../Demos/RetroFetch"
+build_targets="$build_targets ." # the kernel
 
 for targ in $build_targets; do
     echo "Building $targ"
@@ -45,7 +46,9 @@ for targ in $build_targets; do
     fi
 done
 
-$make_cmd clean
+# has no need to build separately, but install headers.
-$make_cmd
+(cd ../SharedGraphics && ./install.sh)
+(cd ../AK && ./install.sh)
+
 sudo ./sync.sh
 

Kernel/sync.sh

@@ -6,7 +6,7 @@ fi
 
 if [ $(id -u) != 0 ]; then
     echo "This needs to be run as root"
-    exit
+    exit 1
 fi
 
 rm -vf _fs_contents.lock

LibCore/Makefile

@@ -36,3 +36,12 @@ $(LIBRARY): $(OBJS)
 clean:
 	@echo "CLEAN"; rm -f $(LIBRARY) $(OBJS) *.d
 
+install: $(LIBRARY)
+	mkdir -p ../Root/usr/include/LibCore
+	mkdir -p ../Root/usr/include/AK
+	mkdir -p ../Root/usr/lib
+	# Copy headers
+	rsync -r -a --include '*/' --include '*.h' --exclude '*' . ../Root/usr/include/LibCore
+	rsync -r -a --include '*/' --include '*.h' --exclude '*' ../AK/ ../Root/usr/include/AK
+	# Install the library
+	cp $(LIBRARY) ../Root/usr/lib

LibCore/install.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p ../Root/usr/include/LibCore/
+cp *.h ../Root/usr/include/LibCore/
+cp libcore.a ../Root/usr/lib/

LibGUI/Makefile

@@ -77,3 +77,9 @@ $(LIBRARY): $(OBJS)
 clean:
 	@echo "CLEAN"; rm -f $(LIBRARY) $(OBJS) *.d
 
+install: $(LIBRARY)
+	mkdir -p ../Root/usr/include/LibGUI
+	# Copy headers
+	rsync -r -a --include '*/' --include '*.h' --exclude '*' . ../Root/usr/include/LibGUI
+	# Install the library
+	cp $(LIBRARY) ../Root/usr/lib

LibGUI/install.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+mkdir -p ../Root/usr/include/LibGUI/
+cp *.h ../Root/usr/include/LibGUI/
+cp libgui.a ../Root/usr/lib/

Servers/WindowServer/install.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+mkdir -p ../../Root/usr/include/WindowServer/
+cp *.h ../../Root/usr/include/WindowServer/

SharedGraphics/install.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+mkdir -p ../Root/usr/include/SharedGraphics/
+cp *.h ../Root/usr/include/SharedGraphics/

Toolchain/CMakeToolchain.txt

@@ -0,0 +1,19 @@
+set(CMAKE_SYSTEM_NAME Generic)
+
+if (NOT DEFINED ENV{SERENITY_ROOT})
+    message(FATAL_ERROR "SERENITY_ROOT not set. Please source Toolchain/UseIt.sh.")
+endif()
+
+# where to read from/write to
+set(CMAKE_SYSROOT $ENV{SERENITY_ROOT}/Root)
+set(CMAKE_STAGING_PREFIX $ENV{SERENITY_ROOT}/Root)
+set(CMAKE_INSTALL_PREFIX $ENV{SERENITY_ROOT}/Root)
+
+set(CMAKE_C_COMPILER i686-pc-serenity-gcc)
+set(CMAKE_CXX_COMPILER i686-pc-serenity-g++)
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+

Toolchain/UseIt.sh

@@ -2,4 +2,5 @@
 DIR=$( dirname $( readlink -e "$0" ) )
 export PATH="$DIR/Local/bin:$PATH"
 export TOOLCHAIN="$DIR"
+export SERENITY_ROOT="$DIR/.."
 echo "$PATH"